Introduction

Why are words important?

In the military, rapid and effective communication is essential. The ASVAB’s Word Knowledge subtest can use any word, from everyday terms to less common ones like relinquish and achromatic (both worked through below), so you need a strong foundation in common academic and workplace words plus a way to work out words you haven’t seen. When you understand key terms, you can interpret information accurately and explain your ideas to others - skills that matter in both military and civilian life.

Depending on how you count them, there are over 500,000 words in English - far too many to memorize one by one. You’ll naturally pick up words the military uses often, like caveat, directive, and protocol, but no one can memorize every word in the dictionary.

So what’s the best way to prepare for the Word Knowledge section? Instead of trying to memorize every word the ASVAB might include, you’ll usually get better results by learning how to break words into smaller parts and infer meaning. This approach helps you handle unfamiliar words more reliably than memorizing a small set of flashcards and hoping those exact words show up.

Most words are built from smaller pieces:

• Prefixes: come at the beginning of a word and change its meaning, like un- meaning “not”
• Roots: carry the base meaning of the word
• Suffixes: come at the end of a word and often set its part of speech, like -able meaning “capable of” and signaling an adjective

These parts work together to determine what a word means, how it’s used, or what part of speech it is.

Prefix + root + suffix

Example: Unpredictable

Unpredictable = un-pre-dict-able
Un - not
Pre - before
Dict - say
Able - capable of

Put together, the word means not capable of being said beforehand - or, in modern language, impossible to foresee.

Types of questions

You’ll see two types of vocabulary questions on the ASVAB: definition questions and context-based questions.

Definition questions ask you to choose the word that has the same or most similar meaning to a given word.

Example: Inhospitable

The word inhospitable most nearly means
A. welcoming
B. sickly
C. unwelcoming
D. authoritative

Context-based questions ask you to replace the underlined word with the best alternative word for that sentence.

Example: Cornucopia

For the holiday meal, there was a cornucopia of dishes on the table.
A. Corny
B. Plethora
C. Delicious
D. Scant

Strategies

Some useful strategies for Word Knowledge questions:

Try to answer the question on your own first.

• Come up with your own definition or synonym before looking at the answer choices. This helps you avoid being pulled toward a tempting but incorrect option.

Eliminate wrong answers.

• Cross out as many incorrect answers as possible. This narrows your choices and improves your odds if you need to guess.

Look for context clues.

• Use the rest of the sentence to guide you. Does the sentence feel positive or negative? Is the underlined word acting like a noun, adjective, or verb? Each clue helps you narrow down the best match.

Break down the word into its prefixes, roots, and suffixes.

• Even if you don’t recognize the whole word, you can often infer meaning from its parts. (We’ll look at this strategy in more detail in the next sections.)

Test your answer.

• Substitute your choice back into the sentence and read it. Does it sound natural? Does it keep the sentence’s meaning the same? The best answer fits smoothly without changing what the sentence is saying.

Caution! Watch out for words that have multiple meanings.

• For example, “object” can mean “a thing” (noun) or “to express disapproval” (verb). Always use the sentence to decide which meaning is intended.

Example: Achromatic

Achromatic most nearly means
A. Vibrant
B. Iridescent
C. Colorless
D. Colorful

Example: Relinquish

After much consideration, she decided to relinquish her role as class president to focus on her studies.
A. Seize
B. Retain
C. Yield
D. Command